Malicious PDF — malware analysis report

Static analysis result for SHA-256 8240c57f3ca9077e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 18:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7b9b09599f8bab4a533340d0a9b11c SHA-1: 038028730231cb8e64457834f092da5ef231da2e SHA-256: 8240c57f3ca9077ed4136ec10bf8a1cf2904c608e8808f9c1dd8c441d551b3b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be part of a link farm designed to attract traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=call+me+maybe+instrumental
    • http://files.drewshanefield.com/uploads/1/3/1/6/131636890/sivetuvepixa.pdf
    • http://xipob.sindenphotography.ca/uploads/1/3/1/4/131453134/314166.pdf
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/88658265077.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/96898164972.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/tafsir_al_quran_bangla_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/gojelibenasagiwo.pdf
    • https://cdn.shopify.com/s/files/1/0447/7173/7749/files/sociology_11th_class_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/jilomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/goblin_diplomacy_quick_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/26845441164.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/vonufokimorek.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/bounty_hunter_dotabuff_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/27788217640.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/anti_social_reformers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/48340519461.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/selenium_automation_testing_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/worship_guitar_chord_inversions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055e7.bin
aadd794d6fd35ea8c460f2a296e129b75c641174bfece5fb959c96680a296a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E7 4980 bytes
font_01_sfnt_off000066c4.bin
7b5e6df37594d586363156ff0aa6f947e6caddb7dfcf71f02a91985520c3d268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 9904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.